In a univariate model, requirement for mechanical ventilation was associated with thrombocytopenia (median platelet count in those needing: 148 × 109/L vs. not needing mechanical ventilation: 266 × 109/L, p = 0.04), hyponatraemia (125 vs. 133 mmol/L, p = 0.03), hyperbilirubinaemia (17 vs. 11 μmol/L, p < 0.01), and increased alanine aminotransferase (ALT: 196 vs. 35 IU/L, p < 0.001). This evidence concerns the gene GPT and Hyperbilirubinemia.